grouper therapy;713849 wrote: Imo no I have used some of the more expensive salts and instant ocean . I could not tell a dimes difference in my tanks . If any change was noted after switching to IO was improvement due to the price of IO being so much cheaper it afforded me more frequent water changes. I think your last statement is true of most disasters and no one wants to admit to it. I know most all if not all of my problems with my tanks was my absolute fault.